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JPH0686017A Expired / Lapsed JP ⏱️ 0.0 years remaining

Color image reader

Assignee: LEO GIKEN KK
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Filing: 1991-08-28
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Granted: —
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Expires: 2011-08-28
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Abstract

Abstract Translated from Japanese (57)【要約】 【目的】 色分解用の各色フィルタを透過した光の光電 変換素子上における集束点の位置ずれをなくし、原稿面 のカラーイメージを鮮鋭かつその色成分を忠実に読み取 ることができるカラー画像読取装置を得る。 【構成】 色フィルタ構成体5を構成する赤,緑,青の 各色フィルタ5R、5G、5Bを、透過する光の波長の違いに 対応してその厚みを変えて形成し、光の波長の違いによ る集光レンズ4の色収差を補正する。これにより、各色 フィルタ5R、5G、5Bを透過した光の光電変換素子2上に おける集束点を一致させることができる。各色フィルタ 5R、5G、5Bを、屈折率が異なるようにその材質を変えて 形成するようにしても、又は厚みと材質との両方を変え て形成するようにしてもよい。 (57) [Abstract] [Purpose] It is possible to read the color image on the original surface sharply and faithfully read its color components, by eliminating the position shift of the focusing point on the photoelectric conversion element of the light transmitted through each color filter for color separation. (EN) A color image reading device capable of being obtained [Structure] The red, green, and blue color filters 5R, 5G, and 5B that form the color filter structure 5 are formed by changing the thicknesses thereof in accordance with the difference in the wavelength of transmitted light. The chromatic aberration of the condenser lens 4 due to is corrected. Thereby, the focusing points on the photoelectric conversion element 2 of the light transmitted through the respective color filters 5R, 5G, 5B can be matched. Each color filter 5R, 5G, and 5B may be formed by changing their materials so that they have different refractive indexes, or by changing both their thickness and their materials.

Inventors

  • 👤 Takayuki Ishikawa
  • 👤 孝之 石川

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-08 18:03
CPC Classifications
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